package 题目集.dfs;

import java.util.Scanner;

public class 外星密码 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        chars=sc.nextLine().toCharArray();
        int cnt=0;
    }
    static char[] chars;

    public static String build(int k,int s,int e){
        StringBuilder res = new StringBuilder();
        String str = new String(chars, s, e - s + 1);
        for (int i = 0; i < k; i++) {
            res.append(str);
        }
        return res.toString();
    }
}
